He is married to Anna Maria - Maria Jänen.
They got married on January 30, 1774 at Wesuwe, Haren (Ems), Landkreis Emsland, Lower Saxony, Germany, he was 29 years old.Source 3
Witness: Henrico Nagell Joe Fischer
Child(ren):
Joannes Hermannus - Johan Henrich - Joan - Bernd Heinrich Schlatmann | ||||||||||||||||||||||||||||||||||
1774 | ||||||||||||||||||||||||||||||||||
Anna Maria - Maria Jänen | ||||||||||||||||||||||||||||||||||

Pauline Berens: Genealogienetwerk zus Greetje Berens voorheen EemslandBoekweitBoerenImmigratie
https://www.genealogieonline.nl/the-dutch-connection/I30561.php
<1826
Otten Joannes Hermannus, Jänen aus Danckeren Anna Maria